Not sure if you are making a premises for your argument or just giving me how you go about it. Even still, If this is an issue of being able to screen the Jackson it received a range nerf to compensate for its increased health this patch and should get out ranged by units like the jagpznr (if you spot for it) or the reketen at vet2. Pak 40 should have no problem just have to see it and if thats the issue utilize the Pio increased Line of sight.
Do you even read the patchnotes? There is no range nerf.
Jacksons have 60 range, on top of 40 sight, superior mobility and a turret.
With a little riflesupport, there is nothing that can touch the jackson (yolo in and out of range if you somehow can't deal with pak walls as usf). People who suggest rushing a pa4 into jackson range are out of this world.
The only TD that might be stronger is a firefly under command vehicle buff and that is brit cheese at it's finest.